/Engine/Plugins/Runtime/DataRegistry/Source/DataRegistry/Public/DataRegistrySubsystem.h
Removes references to a specific asset, returns bool if it was removed
bool UnregisterSpecificAsset ( [FDataRegistryType](API\Plugins\DataRegistry\FDataRegistryType) RegistryType, const [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) & AssetPath )